Support for field-windings.



No. 759,210.. PATENTED MAY 3,1904. B. A. BBHREND.

SUPPORT FOR FIELD WINDINGS.

APPLIOATIOY IILED D110. 7, 1903.

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Irwe ntor Witnesses Bemam' Arl/lur Beltran d i w v THE mums PETERS cu, wow-Luau. W'ASHINuTGN n cy No. 759,210. PATENTED MAY 3, 1904. B. A. BEHREND.

SUPPORT FOR FIELD WINDINGS.

APPLICATION mm 1120. '1, 1903.

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, Inventor Witnesses.- BernardArtkurBekrenJ.

Attorney- Fig. 6.

U ITE STATES.

Patented May 3, 1904.

PATENT OFFICE.

BERNARD ARTHUR BEHREND, OF NORVVOOD, OHIO, ASSIGNOR TO BULLOCK ELECTRIC MANUFACTURING CO., A CORPORATION OF NEW JERSEY.

SUPPORT FOR FIELD-WINDINGS.

SPECIFICATION forming part of Letters Patent No. 759,210, dated May 3, 1904.

Application filed December '7, 1903. Serial No. 184M041v (N0 model.)

To all whom it may concern:

Be it known that I, BERNARD ARTHUR BEH- REND, a citizen of the United States, residing at Norwood, in the county of Hamilton and State of Ohio, have invented certain new and l useful Improvements in Supports for Fieldto centrifugal force become excessive.

. The object of my invention is to provide a construction which will be simple in form, of comparatively light weight, easily assembled, and which will serve to effectively counteract the centrifugal force and relieve the windings from harmful strains and prevent their displacement.

My invention will be understood from the following description and accompanying drawings, and the novelty thereof will appear from the claims.

Figure l is a diagram of forces acting upon the windings. tating field structure with the shaft in section. Fig. 3is a section on the line 3 3 of Fig. 2 with the shaft and collectorrings in full. Fig. 4 is a plan view of my improved coil-support detached from the machine. Fig. 5 is a sectional view on line 5 5 of Fig. 4. Fig. 6 is a plan view of a modified form of coil-support. Fig. 7 is a sectional View on the line 7 7 of Fig. 8 is a plan view of another modifiedform of coil-support, and Fig. 9 is a sec tion on line 9 9 of Fig. 8. I

Fig. 1 shows in diagram afour-pole revolving field, the center being indicated at O. If

AB represents the centrifugal force acting ponents as A D and A O. component A D is much greater than A C,

Fig. 2 is an end view of a ro' upon a portion of the winding located at A, then resolving this into two components, one, A D, parallel with the pole considered, and the other, A C, at right angles thereto, it is apparent that the component A O is very considerable in magnitude and nearly equals the component A D. The latter component, however, is directed against the pole-tips or poleshoes, and the winding therefore is not displaced or strained due to this component. The component A O, however, acting at right angles to the poles and being equal on opposite sides thereof, subjects the winding to a considerable strain, which tends to distort and burst the same. Considering another portion of the winding at A, a greater distance from the center O than is A, the centrifugal force being proportional to the radius may be represented by line A B and its two com- Although this it is apparent that A C is about equal to A C and of considerable magnitude. By my invention I provide an additional support for the windings, which opposes any strain upon them due to the component of the centrifugal force which acts at right angles to the length of the pole.

Referring to Figs. 2 to 5, inclusive, the shaft of a revolving field structure to which my invention is applied is indicated at 1 and is pro vided with the enlarged portion 2, against which rests the end plate 3. The laminae of the core are shown at 4, and these are clamped between the end plate 3 and end plate 5 and locked in place by, the nut 6, threaded on the shaft. The poles are shown built up of laminae 7 clamped between the plates 8, and may be secured to the core in any suitable manner, such as by dovetailing.

The windings on each pole are made up of two partsan outer part 9 and an inner part 9. The poles are provided with the tips 10, and the side plates 8 are provided with the flanges 11, which serve to retain the coils on their cores. The coils rest upon the main core of the machine and are supported at the sides by the cover-plates 12, secured by screws 13 to the main core of the structure. Although the laminae 1 and cover-plates 12 are shown square in general outline, they may of course be of any form and carry as many poles as desired.

Between the coils 9 and 9' of each pole and surrounding the core lies a closed flat sheet of metal 11. This may have any desirable width or thickness, and in the form shown its general width is equal to the depth of the winding. The two opposite sides which extend parallel with the shaft have integral therewith the plates 15. and these extend at right angles to the plate 14 above and below the same in a plane parallel with the shaft. The plates 15 are strengthened. by the main ribs 16 and the radial ribs 17. The inner faces of the plates 15 are provided with the projections 18, which may be tiled, so that when the support is in place it closely engages the windings. Per- :t'orations 19 are formed in the plates 15 to reduce the weight of the same. The ends 20 of the plates are made tapering, as shown in Fig. 3, and may be turned around the windings slightly, as shown in Fig. 1, to increase the strength of the support on the line where plate 15 joins the plate 14.

The coils may of course be connected up in series or parallel, as desired. In the present instance the coils are connected in series, and the leads 21 are connected to the usual sliprings ln assembling, the coils 9 9 and supportingplates are placed upon the field-poles, which are then secured to the main core and the cover-plates 12 attached. If the poles are provided with removable pole-shoes. the coils and supporting-plates may be slipped over the poles after the latter have been secured to the main core.

From the foregoing it is apparent that the windings are not only well supported between the pole-tips and flanges 11 and the main core and cover-plates 12, but the additional plates 15 will relieve the windings from excessive strains and also serve to protect them. The encircling plate 14, owing to its form, can have great strength and also occupy butlittle space. The support is preferably made of brass, phosphor-bronze, or aluminium-bronze to avoid magnetic leakage.

A modified form of support is shown in Figs. 6 and 7. In this case the plate 14 is used the same as in the construction already described, and instead of having plates 15 only on opposite sides of the windings a continuous enveloping sheath 23 is used. The inner face of this sheath is provided with projections 18, which closely tit the coil. The sheath may, if desired, have perforations formed therein for the purpose of reducing the weight.

Figs. 8 and 9 show another modification in which the plate 1a is enlarged at opposite sides, as shown at 24:, and narrow plates or extensions 20 are formed on each side of the plate 1 1. These extensions are spaced from each other and are reinforced by the ribs 26.

It is evident that various changes may be made without departing from the essential features of my invention, and I am not limited to the exact construction shown.

I claim as my invention 1. In a dynamo-electric machine, the combination of a field-frame, a divided field-winding on each pole thereof, and a support for the winding, comprising an inner portion located between parts of the winding and an outer portion engaging the exterior oi the winding.

2. In a dynamo-electric machine. the combination of a field-frame. a divided field-winding on each pole thereof, and a support for the winding, comprising an inner portion located between parts of the winding and encircling the pole, and an outer portion engaging the exterior of the winding.

3. In a dynamo-electric machine, the combination of a field-frame, a divided held-winding on each pole thereof, and a support for the winding, comprising an inner plate located between parts of the winding and an outer portion engaging the exterior of the winding.

1. In a dynamo-electric machine, the combination of a field-frame, a divided field-winding on each pole thereof, and a support for the winding, comprising an inner plate located between parts of the winding and encircling the pole, and an outer portion engaging the exterior of the winding.

5. In a dynamo-electric machine, the combination with the lield-poles and the winding thereon of a support for the winding of each pole, comprising a portion within the holdmagnet structure and an outer portion engaging the exterior of the winding.

6. In a dynamo-electric machine, the combination with the lield-poles and the winding thereon of a support for the winding of each pole, comprising a portion within the fieldmagnet structure and encircling the pole and an outer portion engaging the exterior of the winding.

7 In a dynamo-electric machine, the combination with the field-poles and the winding thereon of a support for the winding of each pole, comprising a plate within the field-magnet structure and encircling the pole and an outer portion engaging the exterior of the winding.

8. In a dynamo-electric machine, the combination with the field-poles and the winding thereon of a support for the winding of each pole, comprising a portion within the holdmagnet structure and outer portions at right angles to said inner portion and engaging the exterior of the winding.

9. In a dynamo-electric machine, the combination with the field-poles and the winding thereon of a support for the winding of each IIO I pole, comprising a plate within the field-magnet structure and outer portions at right angles to said inner portion and engaging the exterior of the winding.

10. In a dynamo-electric machine, the combination with the field-poles and the winding thereon of a support for the winding of each pole, comprising a plate within the field-magnet structure and encircling the pole, and outer portions at right angles to said inner portion and engaging the exterior of the winding.

11. In a dynamo-electric machine, the combination with the field-poles and the winding thereon of a support for the winding of each pole, comprising a plate within the field-magnet structure and an outer sheath integral with said plate and enveloping the winding.

12. In a dynamo-electric machine, the combination with the field-poles and the winding thereon of a support for the winding of each pole, comprising a sheath enveloping the winding and a central plate integral therewith, said plate encircling the pole and located within the field-magnet structure.

. 13. In a dynamo-electric machine, the combination with the field-poles and the winding thereon of a support for the winding of each pole, comprising a plate within the field-magnet structure and outer plates at right angles thereto and integral therewith engaging the exterior of the winding.

14. In a dynamo-electric machine, the combination with the field-poles and the winding thereon of a support for the winding of each pole, comprising a plate within the field-magnet structure, and outer plates at right angles thereto and integral therewith, said outer plates having projections which engage the exterior of the winding.

15. In a dynamo-electric machine, the combination of a shaft, a core thereon, poles on said core, a divided winding on each of said poles, cover-plates oneach side of the core and supporting said windings, and a support for the winding on each pole, comprising an inner plate encircling the pole and located between the parts of the winding and outer plates integral therewith and engaging the exterior of the winding.

In testimony whereof I affix my signature in presence of two witnesses.

BERNARD ARTHUR BEHRENI).

Witnesses:

L. K. SAGER, SANFORD KLEIN. 

